win: fix incorrect directory detection
win: fix incorrect directory detection

Allow other flags too...

run4flat/tinycc,andrewchambers/tccmirror,mingodad/tinycc,andreiw/tinycc,avih/tinycc,seyko2/tinycc,metaeducation/tcc,run4flat/tinycc,mingodad/tinycc,andrewchambers/tccmirror,run4flat/tinycc,seyko2/tinycc,code4game/tinycc,andreiw/tinycc,mirror/tinycc,andrewchambers/tccmirror,avih/tinycc,mingodad/tinycc,metaeducation/tcc,metaeducation/tcc,mirror/tinycc,mirror/tinycc,seyko2/tinycc,andreiw/tinycc,metaeducation/tcc,andrewchambers/tccmirror,andrewchambers/tccmirror,run4flat/tinycc,code4game/tinycc,seyko2/tinycc,code4game/tinycc,mirror/tinycc,avih/tinycc,seyko2/tinycc,mingodad/tinycc,avih/tinycc,run4flat/tinycc,metaeducation/tcc